E-183 Line Relocation

Presentation to:

NEPOOL Reliability Committee

March 2, 2005

115 kV Line E-183 115 kV PTF transmission line E-183:

Connects Manchester Street station in Providence, RI to Brayton Point station in Somerset, MA

Supplies load at Narragansett Electric Co. Phillipsdale, Wampanoag, Mink Street, and Warren substations

Approximately 16 miles in length

Geography Leaving Providence, the line --

crosses the Providence River, traverses alongside I-195 and India

Point Park, crosses through India Point Park,

and crosses the Seekonk river into E.

Providence

Alignment of Line E-183 and Interstate Highway I-195

I-195 Relocation RIDOT is relocating Interstate highway

I-195 through Providence Need based on structural

deterioration, safety deficiencies, and inadequate capacity

Line E-183 must be relocated to accommodate the highway construction project Must be completed by Fall 2005

River Crossing The Seekonk River Crossing is

approximately 87 years old (ca. 1918) Narragansett Electric Co. (NECO)

would like to replace this river crossing coincident with the highway relocation work

Replacing the Seekonk River crossing provides an opportunity to address issues relating to India Point Park and the historic Washington Bridge

Overhead Alignments

Proposed Plan Underground cable from Manchester

Street (Franklin Square) to the Phillipsdale tap in E. Providence satisfies needs of: RIDOT NEPOOL Narragansett Electric Co. State and Local Authorities

Underground Alignment

Proposed Cost Recovery Stakeholders recognize that while the

PTF transmission line provides regional benefits, the primary benefit of undergrounding this section is local

Total Cost $16.724M Local Support $12.949M Regional Support $ 3.775M

Cost Basis for Regional Support

Equivalent to cost of practical and feasible alternative – the “Bridge North Alignment” Removes line from India Point Park Relocates line to north side of

historic Washington Bridge

Cost of AlternativesProvidence

River Crossing

India Point Park Section

Seekonk River

Crossing

East Providence

SectionTotal

O/H – Bridge North 0.300M $2.275M 0.500M 0.700M 3.775M

O/H – Original 0.300M $2.275M 0.300M 0.000M 2.875M

O/H – Tockwotten 0.300M $2.275M 0.400M 0.300M 3.275M

O/H – Bridge South 0.300M $2.275M 0.400M 0.600M 3.575M

Underground 4.700M $4.150M 4.600M 3.274M 16.724M

Conclusions Relocating line E-183 through

Providence provides both regional and local benefits

A combination of regional and local cost recovery is proposed

Regional cost recovery based on cost of practical and feasible overhead alternative Total Cost $16.724M Local Support $12.949M Regional Support $ 3.775M